Automatic gun.



K. FITZPATRICK. AIUTOMATIC GUN. APrucATmu mno `Tuul 1a. |914.V

Patented Nov. 23, 1915.

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l AUTOMATIC GUN.

Specification of Letters Patent.

Patented Nov. 23, 1915.

Application tiled July 13, 1914. Serial No. 850,690.

' To all who/m, 'it may concern.'

a Oklahoma and a rotary breechblock to such a type of gun So that the breech block may be used to transfer thecartridges from the magazine of the gun to the barrel and also to eject the empty shells.

The invention consists in the construction I hereinafter pointed out and claimed.

In the annexed drawings: Figure 1` is a longitudinal section on line 141, Fig.- 2, through the rear end of a gun containing the invention.l Fig. 1 is an enlarged detail of part of Fig. 1,' looking in the direction of the arrow. section on line 2-2, Fig. 1. Fig. 3 is a sectional view, similar to that of Fig. 2, with the position of thekvbreech block changed. Fig. 4 isa perspective view of the breech block. Fig. 5 is a longitudinal section through a portion of the rear end fof the gun, showing the breech block in a position different from that shown in 1. Fig. 6 is a vertical transverse section, similar to that of Figs. 2 and 3, with the position of the breech block still further changed. Fig. 7 is a detail view showing an edge view of the hammer and an end view of the stem of thel breech block. a i

In these drawings: The numeral 1 designates a gun having the barrel 2, the magazine 3 and the breech 4.` The breech 4 has a chamber 5, with a side opening 6, a hollow Space 7 back of the chamber 5,'two slots 8 and 9 in the bottom, a notch 10 between these slots, a recess 11 at the top on the inside and a recess 12 in the middle opening into the front end of the chamber 5. The slot 8 is 'at the rear end 13 of the magazine 3 and is made with a lengthwise portion. 14 and a crosswise portion 15, where the magazine 3 joinsthe chamber 5, and the slot 8 opens into the interior of the' magazine 3. `In the chamber' is placed lthe breech vblock 16. This is shown in perspective in Fig. 4. It is substantially the segment of a cylinder,

Fig. 2 is a vertical transverse having a rounded portion17 anda flattened UNITED lSTATES' PATENT OFFICE.

portion 18. The rounded portion 17 atone side isshorter formingv a recessv 19 'at 'the end 20 of the breech block; In this breech block is made a bore( 21 running nearly through the breech block,'-liaving. the front end 22 open an'd the rear endv 23 closed. In the flattened portion 18 there is made a concave recess 24 extending almost the entire 'length of the breech block Ahaving an open end 25 and closedfat the end 26. At its front end 20, the breech block v16 hasat thev cen-v ter of this end 20 a pintle 27 fitting the recess 12 of the breech. Extending centrally through the breech block '16 lisa bore 28 closed at the pintle end and having the open.

ing 29 at the rear end 30 vof the breech block. Opening froml the bore 28'into'the bore 21 is a slot 31 and another slot 32' opens from the bore 28 into the recess` 24. The slot 31 and the slot 32v are the same length but the slot 31 lextends farther toward the end `30 of the breech block 16. In bore 21 is'placed a plunger 33 having a flathead 34 toward vthe front end 22 of the bore and the cup 35 extending rearwardly from this head 34.

In the cup 35 is placed a spiral-spring 36 'which bears between-the flat head 34 and the closedend 23 of the bore whenthe plunger 33 is at that end of the bore.VV Secured to the outside of the Hat head 34 of the plunger 33 is a lug 37 of an extractor: 38, the lug extending through the slot 31 and the body 39 of the extractor snugly fitting the central 1 bore 28. The operative finger 40 of the-extractor extends through lthe slot 32 and protrudes into the concave 24. In the solid portion of the breech block near the center of the block there is a passage 41 parallel with the axis of the block and also another oblique-passage 42 running from the edge of the end 30 of the breech block 161:0 about the center ofthe end 43 at recess 19. At the front end of the passage 41 there is an `enlargement 44 vof the passage and another enlargement 45 at the front end of the pas# sage 42. At the front end ofthe enlargement 44 is a nut 46 with a Smooth hole 48 therein and-at the front end of the enlargement 45 is a nut 47 with a smooth hole 49 therein. In the passage 41 is placed a recoil bolt 50 having a collar 51 inthe enlargement 44 and l a flatend 52 protruding through the hole 48 of the nut 46. Around the recoil bolt 50 in the enlargement 44 are the springs 53 and 54, one-on each side ofV Athe collar 51. kIn thepassage 42 is a firing pin 55 having a collar 56 in the enlargement 45 and a pointed end 5'7 protruding through the hole 49 ofx 'the nut 47. Around the fir-A ing pin 55 inthe enlargement 45 are the Vsprings -58 and 59, one on each side of the f collar 57i' 'y At the yother"end 30, the breech block 16 has a shallow radial kerf 60, made in its outer face in line with the ends of the passages 41 and 42. This kerf has straight sidesr61 and 62 and a curved end 63. In the lcurved 'sur'faceyofthe breech block 16 there is a c'ha-nnelurinjng partially around the -eend 30 thereof. Atthe corner e dfthe breech block 16l i nearer,"` the there is lan edgey recess 65 runningf 'the Vedge 66 of the breech block and terminating at an abrupt shoulderv 67. A portion 'fof-the edge recess 65 and the abrupt shoulder 67 are backV of a portion of l the channel 64 at the end 68. At the other v der 71 are back of n. portion of thechannel 64at its other end' 72.

a Keyed in the hole 29.of the rear end 30 of the breech block 16 is the end 73 of a rod 74 havin fastened upon its other end 75 the mutilated gear wheel 76 with the teeth 77` and the flat edge 78. Ona pivotl 79 is placed a sector-shaped hammer 80 in operative location with the gear Wheel 76 and the rear of the breech block 16. This hammer 80 has a width. corresponding to that ,of the kerf and a rounded end 81 fitting the curved end 63 of the -kerf 60. The hammer has at one corner a pointed heel 82 at the other end and a notch 8f3 at the heel.v Near the other corner,fthe hammer has a curved rack of teeth 84 and av single enlarged tooth 85 .at the top endof the. rack, the teeth being on the side of the hammer toward thewheel 76. .The single .tooth 85. Apasses floosely.

vthrough a hole 86 inthe hammer80 and is attached tothe loose 4end 87 of a spring 88,

. l thebther endv89 of which is fastened to the ahammer, 8,0.` :Near the loweredge 90, the

-lfghammen 80-has a pin 91 projecting'side-A ,;'wis e onthe' side opposite to that on which ..is',fthe rod 74. 'On the underside of this pin 9.1x10ears' the loose upper end 92 of a flat lsprin'g93,the` other and lower'end 94 of which issecured to the breech 4. Hooked over'lthe pin 91 is the curved end .95 of the vverticalv arm 96 of theL triggerguard 97,

which is pivoted at 98 at the edge of the slot 9 of the' breech 4, and ywhich has the curved horizontal arm 99, the front end,v 100 of which fits into the notch 10 of the breech 4. On the trigger guard pivot'98, alongside of the vertica arm 96 of the trigger guard 97 ,l there is. pivoted a hammer lock 101.v

rear of thebreech block 16,

The-vertical arm 96 of the trigger guard 97 `101 has an end 106 which is under the arm 96 and is turned so as to come in the path ofthe pointed heel 82'of the hammer 80.1 'i

The lower end of .ltheg lock 101v sjthrough the. slot 9,* the curved ont against th'e-edge 109i: it n pivoted in the front-enano- Of ,the guard 97 is aspring pressed, lockingeatch" 111, the upper end ,112 of which engages a smallv recess 113 fin the notch 10, `and thel lower end projects out beyond Lthe edge'of the trigger guard. In the breech 4, at the edges of the slot 9, there is e trigger 114. This` trigger 114 has the finger pull 115 be# low the breech, the toe `116 in line with the channel`64 and a heel 117 in linewith the` For .better operation of the device, there is secured to the barrel 2 at the recess 11,- a spring 118, by its front end 119, its rear aend 120 being free. Also at the rear end of the magazine, there isA located a spring 121 ,`one end` 122 being fastened and the curvedend 123 free `and, extending upwardly.' At the inner end of the barrel 2, there is thejusual ivoted at the reeess'124 to receive the rim of the cartridge.

' The lower side of thebreech kis ,made of `such a thickness that Where the magazine 3 joins the chamber' 5, there is a'recess 125 so that the inner surface of the magazine is Hush with lthe inner surface of the bore 21 of thebreeeh block 16.

.With vthe parts as `vlindicated in Figs. 1 and 2, the trigger guard 97 is released inA front by pressing on -the lower" end of the l locking catch 111 and is swung downwardly and backwardly. Through the hooked end 95 bearing on thepin 91, the hammer 80 is swungbackwardly and downwardly on the pivot 7 9 until the pointed heel 82' is caught by the end 106 of the hammer lock 101 and the spring93 is pressed downwardly. The trigger guard 97 is then swung upwardly and locked` in front. The trig er 114 is pulled tothe position shown in the hammer lock 101 is released by pressing onl its lower. end, the. hammer. 8O moving downwardly suliciently to permit the en A ig. land.`

106 to be disengaged from the heel v82of the hammer 80. The spring 93 pressing on the pin 91 causes the hammer 80 to turn on its *pivot 79. The tooth 85 starts the ysloping end 71 0 vpart only gear wheel 76 and through the rodv74 partially rotates the breech block 16. The other teeth 84 of the hammerv 80 continue this rotation. the heel 117 of the trigger 114 enters the recess .69 and catching at the sloping end 71 checks the movement ofthe parts. The breech block 16 having vpushed the spring 121 back into a recess 126 which may be made for the spring, the feeder spring, represented at A, will' force the first cartridge into the bore 21, pushing the lunger 33 and compressing the spring 36. he feeder spring A should be of'such power as to feed the cartridges to the.bore 21 and also compress the loader spring 36A so that the latter may perform its own function. Further action of the hammer spring 93 causes further rotation of the breech block 16 and the heel of the trigger 114 riding out of the the -recess69 and upon the surfaceof the breech block 16, the toe 116 of the trigger 114 is pressed into the channel 64^at its end 72. The breech block continues to rotate until the toe 116 of the trigger 114 reaches the other end 68 ,of the channel 64, when rotation is again arrested. This brings the bore 21 with the loaded cartridge in linewith the gun barrel 2. The loader-spring 36 then forces the plunger 33 forward which shoves the loaded cartridge into the gun barrel'2, the front edge of the breech block pushing the end 120 of the spring 118 into the recess 11 and the rim of the cartridge resting in the recess 124. The gun is now loaded and readyfor firing. The action of the hammer 80 is suspended, a part only of the teeth 84 having engaged a of the teeth 77 of the wheel 7 6'. It is now perceived thataction of the hammer i's controlled by the trigger through the breech block 16 and not directly. v'Ifo fire the gun, the trigger 114 is pulled, the toe 116 being withdrawn from the channel64 and the heel 117 enters the recess 65 at the end 67. Rotation of the breech block 16 continues, and when'all the teeth 84 of the hammer 80 have engaged all'the teeth of the gear wheel 76, there has been a complete revolution of the breech block 16, and it is in the position shown in Figs.I 1 and 2. The hammer 80 falls and its front edge entering the kerf 60 drives the firing pin 55 against the cartridge and exploding the latter rcauses the gun to fire. The recoil forces backward the empty cartridge case which shoves the spring 118 into the recess and theI rim of the cartridge catches beyond the end 120 of this spring 118. rIfhe empty cartridge, striking the firing pin 55 and recoil bolt 50, drives them back, the springs 58 and 54 easing the shock. The recoil bolt 50 forces the ,hammer 80 backward; the teeth 84 pass cl'ear of the fiat side 78 ofthe gear wheel 76; the singletooth 85 moves through the As the breech block 16 rotates r additional function.

hole 86 of the hammer 80 and, after passing the wheel 76, is shoved out into operative position by the spring 88. The spring 93 is again pressed and the heel 82 catches the hammer lock 101. When ready to again fire, the action is continued with the .following As there is now an empty shell in the gun, the extractor comes into action. As the movement before described takes place, the operative finger 40 of the extractor 38 is turned infront of the rim of the 'empty cartridge. When another loadedy cartridge isY fed into the bore 21 and the plunger .33 is pushed inward, the ex-y tractor 38 withdraws the empty shell from the gun barrel 2 into the concave recess 24.

As the breech block 16 is further rotated, this empty `shell is ejected from the gun through the' opening 6. After the firing pin 55 and the recoil bolt 50 areturned from the empty shell, the springs 58 and 54-returnthem to operative position.

Having described my invention, whatI claim is:

1. A magazine gun, provided with a breech block, for receiving cartridges, and means,

separate from and mounted wholly within the breech block, and operated b v the co operative action of the magazine loading mechanism andthe movement of the breech block, for transferring the cartridges to the gun barrel.

2. YA gun provided with a rotary'breech block for receiving cartridges and means separate from, secured to the breech block and vrotatable. therewith for transferring the.' cartridges to the gun barrel.

3. A gun provided-with a barrel, a magazine with a loading spring, and between the two a breech block for receiving-cartridges from the magazine, and means separate from and mounted wholly within the breech block and operated by the coperative action of the magazine loading spring and the movement of the breech block, fortransferring the cartridges to the gun. barrel.

4. lA gun provided with a barrel, amagazine and between the two, a rotary breech block`having a receptacle for receiving car tridges from the magazine and means separate from, secured to the breech block and rotatable therewith for transferring the cartridges from the magazine to the gun barrel.

5. A gun provided with a barrel, a magazine and a rotary breech block between the barrel and magazine, containing a receptacle for receiving a cartridge from the magazine and means secured within the receptacle for placing such cartridge into the gun barrel.

6. A gun provided with a barrel, a magazine A and a rotary breech block'between the barrel Y the .gun barrel and means\for ejectin' an oth .7. Ina

empxty cartridge from the gu'n barrel, suc means secured to the breech block.

and magazine, side by side, a'rotarv'breech blockfat the ends of the barrel and the magazine the breech block being provided with al receptacle to receive a cartridgel from the magazine, means for placing such cartridge into the barrel'and means for ejectin lan empty cartridge shell from the barrel, oth such means secured to the breech block. e

. I 8.y In a gun, a.' breech block provided with means. separate'. from the breechblockufo placing 'ag cartridge lin the gun *barre and connected vWithjsuchmeans, other means 4tothe breechblock. e

eheufrem the gun .bugzi Ibothsuch meansy Within-and wholly secu- 9' breech block provided with e reeebtacle for holding a loaded shell, a hammer,-

a firing pin and recoil bolt and a recess .for receiving an empty shell.

1,0. A- breech block provided with an exi-"- terior channel extending partially around a the breech block and two edge recesses in combinationv with .a trigger having atoe adapted to the channel and a heel adapted to `the recesses'y and meansfor rotating `the breech block.

11. A breech block provided with an exvterior channel extending partially around the lbreech block and two edge recesses, one of them having` a sloping shoulder, in combination with a trigger having a toe adapted to the channel and a heel Vadapted to the recesses and means for rotating. the `breech block. ,l 12. A gun having a barrel, a magazine,

a breech made with anr opening at one side,

abreech block located at said opening and provided'with means for transferring a' loaded cartridge fromthe magazine to the barrel and means for ejecting an e-mpty cartridge from the barrel through the opening in the breech, both such means secured to the breech block.

v13. A gun having a barrel and a magazine side by side, a breech made with an opening at one side, a rotary breech block located at said openin and provided with a receptacle to receive a oaded cartridge from the magazine, means for placing said cartridge in thebarrel and means for ejecting an empty car.

tridge fromv the barrel through the opening in the breech, both such means secured` to they breech block;

14. A rotary breech block having extend` ing therefrom ai rod with a gear Wheel thereon incombination with a hammer having `teeth for .engagement-with theteeth of the gear wheel.l n

15. A rotary breech block having extending therefrom a rod with 'a gear wheel thereon in combination with la hammer' having n, the combination of a barrel teeth for engagement with the teeth of'the Q ggar wheel, one of the teeth of the hammer ing longer than the c'thers. e

16'. A rotary breech block havingextending therefrom a .rod with aV gear wheel thereon in combination with ahammer, having 'teeth for engagement with the teeth of the ear wheel, one of the teeth of the hammer in rlon er than .the others, and a spring whic ho -ds .the latter tooth to/.the Agear wheel n vThe combination of fa breechv block f a.z rod extending therefrom with aA a l gear wheel, and a hammer having' has.:

er engagement 'with the teeth of ythe one ofthe teeth of the 4hammer tliianjthe' otihersl Y 4vavmg a arre, a magazine,

yigech block,..means for automativlyee di1g cartridges to the-breech block l means for `automatically loading cartridges fromthe breech block into the barrel.

-' 19.' A having a barrel, a magazine, a rotary breechblock, means for automatically feeding cartridges to the breech block and means secured to the breech block for loading cartridges from the breech blockqinto the barrel.

20. A gun having a barrel, a. magazine,

a lsprin within the magazine, a rotary breech b ook having a receptacle and a spring within the receptacle.

y 21. A gun providedv with al barrel, and' a, `magazine, side by side, a rotary breech block at the ends of the barrel and magazine, having a. receptacle to receive cartridges from the magazine, a spring in the magazine to feed cartridges into the receptacle and an magazine and a recess to receive empty cartridges from the gun barrel and having in the receptacle a plunger and connected with such plunger an extractor, the operative finger of' which extends into the recess.

25. A breech block having two passages therethrough and in one passage a firing. pin and inthe other a recoil bolt. i

2a A .breeeh bleek provided with e re,

tacle to receive loaded cartridges from a 26. A breech block havingl two passages therethrough'and in one passage a firing pin and in the other a recoil bolt, each .having a collar and aspring on each `side ofthe collar.

27. A'vbreech block having. two passages running lengthwise therethrough, one obv In testimony whereof I have axed my lique and the otherk arallel to the axis vof signature in presence of two witnesses. the block, and in the ormer a xing in and in the latter a recoil bolt, the block a so hav- KI'RBY FITZPATRICK' I ing at its front end a recessA into which-the lWitnesses:

front ends of the firing pin andthe recoil ED. S. BUmRFIELD,

bolt extend. l

' l K. T. FITZPATRICK. 

